The sample contains 0.11 mol of
We can use the Ideal Gas Law to solve this problem:.
#color(blue)(bar(ul(|color(white)(a/a)pV = nRTcolor(white)(a/a)|)))" "#
We can rearrange this equation to get
#n = (pV)/(RT)#
STP is defined as 1 bar and 0 °C.